What was found
AFTER FLIGHT F/A REPORTED LEFT AFT LAV SMOKE DETECTOR WENT OFF IN FLIGHT. ONE PAX REPORTED SMELLING SOMETHING. IN FLIGHT F/A REPORTED WHAT PAX SAID I ASKED FOR DETAILS, SHE SAID SHE SMELLED NOTHING; AND NO REPORT OF ALARM. ONLY AFTER WE DEPLANED DID SHE TELL ME ABOUT THE ALARM. COMPLIED WITH NO GO ODI PREVENTION ATA 2172. COMPLIED WITH PNEUMATIC DIST. CABIN SMOKE/ODOR WORKCARD 2120-2367. NO DEFECTS NOTED. COMPLIED WITH WORKCARD 7100-2619 - PNEUMATIC SYSTEM DUCT BURNOUT. REMOVED AND REPLACED LEFT AFT LAV MIRROR LIGHT BULBS PER MD88 33-22. OPS CHECK GOOD. INSPECTED LEFT AFT + RIGHT AFT LAV TRASH BINS. NO DEFECTS NOTED. AFT LAV SMOKE DETECTORS OPS CHECK GOOD IN REFERENCE TO MD88 AMM 26-13. OK FOR SERVICE. (LP6544408)